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  • Lefthand SAN questions.

    - by Gk
    I'm curious about Lefthand SAN solutions from HP. People from Dell have told me that Lefthand SAN's require at least two nodes and data must be mirroring between them so capacity is a half less compare to other SAN technology (e.g.Equal Logic). Is it true? Can a HP lefhand SAN be used as a stand-alone storage server with full RAID function (1, 10, 5)? TIA, -giobuon

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  • My server is slower than the average user's computer, should I still offload Access queries to SQL Server? [closed]

    - by andrewb
    Possible Duplicate: How do you do Load Testing and Capacity Planning for Databases I have a database set up with MS Access 2007 front ends and an SQL Server 2005 back end. At the moment, all the queries are saved in the front end as I've only recently moved to an SQL Server backend. I'm wondering how much of those queries I should save as stored procedures/views on SQL Server. About the system The number of concurrent users is only a handful, though it could be as high as 25 at one time (very unlikely). The average computer has an Intel i3-2120 CPU running at 3.3 GHz, which gets a PassMark score of 3,987, whilst the server has an Intel Xeon E5335 running at 2.0 GHz, which gets a PassMark score of 2,637. Always an awkward situation when an i3 outperforms a Xeon... though the i3 is from Q1 2011 and the Xeon is Q2 2009. There is potential for a server upgrade in the future, though it wouldn't come easy. I'm inclined to move the queries to the back end, as they are beginning to take noticeable time and I figure that is a better way of doing things. I like the idea of throwing everything at the server, then pushing for a server upgrade. It makes more sense in my mind to be upgrading one server rather than 30 PCs. Or am I being overzealous? Why my question isn't a duplicate It seems that my question has been misinterpreted and labelled a duplicate of quite a different question, one about testing and capacity planning. I'll try explain how my question is very different from the linked question. The crux of my question is something like "Even though my server is technically slower, is it better to have it doing more of the queries?" There's two ways that people could have answered this: I agree the server is going to be slower, but the extra benefits of such and such (like the less Access the better) means you should move most to the server anyway. (OR no it doesn't outweigh the benefit, keep them in Access) Actually the server will be faster because of such and such. I'm hoping that people out there could provide some answers like this, and the question in the dupe link doesn't really provide either of these answers. Ok sure, I suppose I could do extensive performance testing to compare Access queries running on a local machine to SQL Server queries running on the server, but that sounds like a very hard task (particularly performance testing of access) compared to someone giving some quick general guidance, and again, my question is looking for a lot more than immediate performance benefit.

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  • Using SSD as disk cache

    - by casualcoder
    Is there software for Linux to use an SSD as disk cache? I believe that Sun does something like this with ZFS, though not sure. A quick search provides nothing suitable. The goal would be to put frequently requested files on the SSD on-the-fly. Since the SSD has more capacity than RAM for less money and better performance than hard disk, this should provide an efficient performance boost.

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  • Lefthand SAN quetions.

    - by Gk
    I'm curios about Lefthand SAN solution from HP. Ppl from Dell told me that lefthand SAN require at least two nodes and data must be mirroring between them so capacity is a half less compare to other SAN technology (e.g.Equal Logic). Is it true? Can a HP lefhand SAN can use as a stand-alone storage server with full RAID function (1, 10, 5)? TIA, -giobuon

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  • Not able to Defrag my drive for shrink even using PerfectDisk on Windows 7

    - by Mithun Sasidharan
    I want to partition my c drive which has over 450gb capacity of which hardly 30gb is being used. I deleted the pagefile.sys and also disabled hibernate and cache memory. I then defragmented and consolidated free space using PerfectDisk 12 and also run a boot time defragmented. Now what remains is Metadata files that preventing me from shrinking the volume beyond half the size if disk. Please tell me what to do?????

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  • When to use a RAM-Disk?

    - by Ice
    Hi, I know that RAM-Disk are fast, faster than any Disk but they lose their contents on a shutdown of the operating system. The capacity is limited to the RAM. Is there a usefull implementation on a new 64-Bit windows 2008 server? Peace Ice

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  • Hardware recommendation for Solaris 10 + ZFS data warehouse server.

    - by Justin
    The server would run a 2 drive (mirrored root pool for OS and master database segment). And would run individual zpools for each remaining drive (loss of data is acceptable). Initial requirements would be: 2x 7540 xeons (6 core) 32gig memory. 12 drives. A 4U/2U server (6/8 core and 2/4 sockets cpu support) with internal disks / or external JBOD. Capacity to house a disk per CPU core is important.

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  • Windows 7 120 GB disc drive C full

    - by user234570
    I have windows 7 and my disc drive has a capacity of 120 GB. From one day to another it tells me that my disc C is full in a red bar but I dont have many programs installed. I deleted all of my videos, games, music, pictures, etc and I was able to free up 30 GB. I ran the disk cleaner and emptied the TEMP folder and garbage can but it still shows a 70GB used. Can I get some help from the experts PLEASE!!!

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  • how to see disk details from linux machine with which command?

    - by jennifer
    hi all subject: LINUX - release.5.4- verify disk details from linux with sfdisk -s I can see the disk capacity as the following: sfdisk -s /dev/cciss/c0d0: 143338560 total: 143338560 blocks but how to see also the disk details as disk manufacture ... etc I try the: , but I not get the right info -(: hdparm -i /dev/cciss/c0d0 /dev/cciss/c0d0: HDIO_GET_IDENTITY failed: Inappropriate ioctl for device

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  • How can I copy a Virtual Machine on VMWare ESXi 4 while maintaining Thin Provisioning?

    - by Billy ONeal
    We have an ESXi host we use for testing, which results in a ton of VMs being created and copied on a regular basis. We don't have the storage capacity to use thick provisioned VMs on this server, and have been maintaining the copies using VMWare Converter. But using the converter is an incredibly slow operation which copies the entire contents of the VM over the network several times before actually finishing the copy. Is there a way to simply clone the VM but maintain the thin-provisioning?

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  • upgrade on graphic card board memory

    - by farzad
    is it possible that the amount of memory available on a graphic card board be updated/altered? I' mot talking about the shared memory that the graphic controller might use from system memory (RAM). my question is: "is it possible to replace/alter the memory available on the graphic card dedicated memory attached on the graphic board, with a similar memory but with higher capacity?"

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  • Upgrading disks in WD My Book Studio Edition II

    - by Bryan
    About 18 months ago, I purchased a 1Tb Western Digital My Book Studio Edition II for backup of my home system. It has 2x 500Gb drives in it, which I had configured as RAID 1. One of the disks has now died, and rather than replace like for like, I'd like to replace both drives to increase the capacity (2 x 2Tb would be nice). I'm struggling to find a list of compatible drives, has anyone else upgraded theirs?

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  • Zenoss need to get freespace threshold and alerts on windows "mount points"

    - by agilenoob
    I have a WMI query that will give me all the data I need to do this but I can't figure out how to get this working in Zenoss. I know I need to set data points and a threshold, and optionaly a graph. The problem is examples of how to do this with WMI are few and very confusing. Could anyone atleast point me to documention on how to do this? WMI Query(WQL): "SELECT Caption, Capacity, Freespace FROM Win32_Volume WHERE DriveLetter IS NULL"

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  • VMWare Pre-Allocated vs. Growable, which is faster?

    - by tekiegreg
    In an effort to increase speed in my Vmware setup, I was thinking about converting a Windows XP Guest 32 bit I have from growable to pre-allocated, I'm currently running VMWare Workstation 7 with Windows 7 64 bit as the host. Specs: Dual Core CPU, one allocated to guest 4GB of RAM, 2GB to guest HD max capacity is 500GB, 150GB allocated to guest (I have 300GB left and don't mind parting with the space, currently HD is 80GB and converting would obviously add another 70GB of space), HD that guest is running on is separate from Host OS Either that or any other suggestions you have might be appreciated, thanks!

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  • R2 live migration between Opteron 8354 and 2435

    - by Safin09
    As per title, will the processor compatibility option allow a live migrate between an AMD Opeteron 2435 (dual proc, hex core) and an AMD Opteron 8354 (quad proc, quad core)? We are out of capacity and wish to use a newer dual socket server rather than an older (yet much more expensive) quad socket server in our cluster.

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  • Get Used rather than Provisioned space in PowerCLI

    - by Matt
    I'm trying to run a capacity report, and when I run the Get-HardDisk cmdlet in PowerCLI, the value it returns for CapacityKB is the Provisioned space. For example, let's say I've thin provisioned a 200GB disk, which is currently using say 30GB, it returns the 200GB value. Is there any way I can get the other value? I need to know how much disk space is actually being used on the LUN by the vmdk file. My PowerCLI version is 5.0.1.

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  • Make logwatch reports more interesting?

    - by Alexander Shcheblikin
    Is it possible to improve the quality of reports from logwatch? Like make it not just report disk usage which doesn't even change much in daily operation, but report significant changes in usage or approaching critical capacity levels? If I cannot do that with logwatch and instead have to write custom scripts to produce such reports, logwatch appears to be pretty useless, or even dangerous, as many users reportedly grow to ignore emails from it knowing they are so boring.

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  • Does SDHC have any write error recovery ?

    - by marc
    What happen if SDHC card get write error (damaged cell / bad sector) ? Whole card is unusable (to trash, all data written to that sector now and in future will be lost) ? or rewrite sector (flash memory get corrupted when writing so maybe have any function to check if sector was written successfully) to another and mark as fault as unusable what will be seen as reduction of capacity but no data lost. I have to do some research about SD card-s on disk less machines. regards

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  • Does SDHC have any write (ECC) error recovery ?

    - by marc
    What happen if SDHC card get write error (damaged cell / bad sector) ? Whole card is unusable (to trash, all data written to that sector now and in future will be lost) ? or rewrite sector (flash memory get corrupted when writing so maybe have any function to check if sector was written successfully) to another and mark as fault as unusable what will be seen as reduction of capacity but no data lost. I have to do some research about SD card-s on disk less machines. regards

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  • Mac OS X missing disk

    - by leo
    In boot camp, it only see partition size to be 149G while disk utility shows only one partition with size 320G. Why diskutil and df gives me different sizes? Also how can i fix it? thanks df -h Filesystem Size Used Avail Capacity Mounted on /dev/disk0s2 **149Gi 20Gi 129Gi 14% /** devfs 110Ki 110Ki 0Bi 100% /dev map -hosts 0Bi 0Bi 0Bi 100% /net map auto_home 0Bi 0Bi 0Bi 100% /home and diskutil list /dev/disk0 #: TYPE NAME SIZE IDENTIFIER 0: GUID_partition_scheme ***320.1 GB disk0** 1: EFI 209.7 MB disk0s1 2: Apple_HFS Mac HD 319.6 GB disk0s2

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  • How should I interpret the specifications of a SSD?

    - by paulgreg
    When considering to buy a SSD, how should I interpret the different specifications of the SSD? Here are some specific things that need to be deciphered: Controller (this can affect performance and endurance more than all other factors combined) Bus Technology Form Factor (Physical Size) Capacity NAND or NOR technology Power Consumption during Read, during Write, when Idle Read/Write Burst and Sustained Throughput All of these things I would like to be explained in more detail and their actual importance in selecting an SSD.

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  • "No space left on device" with FreeBSD

    - by why
    When I login with root, and run "mkdir .ssh", the system says "No space left on device". But if I login with other user, it goes well. [/root]df -h Filesystem Size Used Avail Capacity Mounted on /dev/da0s1a 496M 411M 45M 90% / devfs 1.0K 1.0K 0B 100% /dev /dev/da0s1e 496M 12K 456M 0% /tmp /dev/da0s1f 57G 878M 51G 2% /usr /dev/da0s1d 4.3G 215M 3.8G 5% /var [/root]mkdir .ssh /: create/symlink failed, no inodes free mkdir: .ssh: No space left on device

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  • Multi device BTRFS filesystem with disk of different size

    - by fokenrute
    I have an existing BTRFS filesystem composed of one 500GB disk and I just bought a 2TB disk to increase the storage capacity of my home server and I want add the new disk to the existing filesystem. From what I read, it seems like no BTRFS setup can handle disk of different sizes without wasting the difference in size between the larger and the smaller disk, but I'm new to BTRFS and I might have missed something, so is there a setup that can allow me to combine two disks in a filesystem without wasting space ?

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  • Are there any well known anti-patterns in the field of system administration?

    - by ojblass
    I know a few common patterns that seem to bedevil nearly every project at some point in its life cycle: Inability to take outages Third party components locking out upgrades Non uniform environments Lack of monitoring and alerting Missing redundancy Lack of Capacity Poor Change Management Too liberal or tight access policies Organizational changes adversely blur infrastructure ownership I was hoping there is some well articulated library of these anti-patterns summarized in a book or web site. I am almost positive that many organizations are learning through trial by fire methods. If not let's start one.

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